Fatal error: Uncaught Error: Class "GraphQL\Type\Definition\ScalarType" not found in /var/www/html/vendor/webonyx/graphql-php/src/Type/Definition/BooleanType.php:11 Stack trace: #0 {main} thrown in /var/www/html/vendor/webonyx/graphql-php/src/Type/Definition/BooleanType.php on line 11